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3 years ago

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Students in Mrs. Walsh’s math class wanted to know the favorite snacks of students in the school. How could they generate a rand

om sample to survey?

1 answer:

frozen [14]3 years ago

6 0

Answer:

Step-by-step explanation:

Abajkavsowvsj some people who have never in the game and have a lot

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A student did a survey on how people feel when they are hungry. The results were that more people felt a stabbing pain than thei

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it’s 19 :)

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3 years ago

You are making a flower arrangement. There will be 32 flowers in the arrangement. Roses cost $2 each and carnations are $1 each.

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I think there are 25 roses and 7 carnations.

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3 years ago

Read 2 more answers

1. What is the solution of n² – 49 = 0? (1 point)

maks197457 [2]

Answer:

1. $n=\pm7$

2. $x=\pm7i[tex]3.[tex]\pm 12x =a$

4. 22

Step-by-step explanation:

1. $n^2 - 49 = 0$

$n^2 =49$

$n= \sqrt{49}$

$n=\pm7$

2. $x^2+64 = 0$

$x^2 =-64$

$x= \sqrt{49}$

$x=\pm7i[tex]3. Area of square = [tex]a^{2}$

Where a is the side

We are given an area o square = $144x^{2}$

So, $144x^{2}=a^{2}$

$\sqrt{144x^{2}}=a$

$\pm 12x =a$

4. We are given that the solution of quadratic equation -9 and 9

So, equation becomes:

$(x+9)(x-9)=0$

$x^2- 81=0$

So, in the given equation $x^2 + z = 103$

z should be the number from which if we subtract 103 so we get 81

Substitute z = 22

$x^2 + 22 = 103$

$x^2 + 22 -103=0$

$x^2 -81=0$

Thus the value of z is 22

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3 years ago

Read 2 more answers

Nine voltage measurements in a circuit have produced the following values: 12.09, 12.05, 11.94, 11.99, 12.12, 12.05, 12.02, 11.9

Debora [2.8K]

Answer:

we can not reject any value

Step-by-step explanation: From data we can test the highest and the lowest value to evaluate if one of these values are out of certain confidence Interval

If we established CI = 95 % then α = 5 % and α/2 = 0,025

From data we find the mean of the values

μ₀ = 12,03 and σ = 0,07

From z table we find z score for 0,025 is z(c) = ± 1,96

So limits of our CI are:

12,03 + 1,96 = 13,99

12,03 - 1,96 = 10,07

And all our values are within ( 10,07 , 13,99)

So we can not reject any value

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3 years ago

What are the properties of real numbers?

expeople1 [14]

Https://mathbitsnotebook.com/Algebra1/RealNumbers/RNProp.html

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2 years ago